Angle Orthod. 2018 Jan;88(1):10-19. doi: 10.2319/022517-142.1. Epub 2017 Oct 6.
To compare the skeletal, dentoalveolar, and soft tissue changes in Class II malocclusion patients treated with Jones Jig and Distal Jet distalizers followed by fixed appliances.
The experimental groups comprised 45 Class II malocclusion subjects divided into two groups. Group 1 consisted of 25 patients treated with the Jones Jig, and group 2 consisted of 20 patients treated with the Distal Jet. Group 3 comprised 19 untreated Class II subjects. Cephalograms were analyzed before and after orthodontic treatment. For intergroup comparisons, one-way analysis of variance and post hoc Tukey tests were performed.
During treatment, the experimental groups exhibited significant increases in occlusal plane inclination and maxillary second molar mesial tipping. Additionally, the molar relationship improved and overjet decreased significantly in the experimental groups. The Jones Jig group showed greater mandibular incisor proclination and greater overbite reduction than the control group. No significant intergroup differences in nasolabial angle changes were found.
Treatment protocols using the Jones Jig and Distal Jet followed by fixed appliances were effective in correcting Class II malocclusion by means of dentoalveolar changes without significant skeletal and soft tissue changes. The experimental groups showed occlusal plane clockwise rotation and greater mesial tipping of maxillary second molars when compared to the untreated group.
比较使用 Jones Jig 和 Distal Jet 远移器治疗的 II 类错颌患者的骨骼、牙颌和软组织变化，以及随后使用固定矫治器的治疗效果。
实验组由 45 名 II 类错颌患者组成，分为两组。第 1 组由 25 名使用 Jones Jig 的患者组成，第 2 组由 20 名使用 Distal Jet 的患者组成。第 3 组由 19 名未经治疗的 II 类患者组成。在正畸治疗前后分析头颅侧位片。为了进行组间比较，采用单因素方差分析和事后 Tukey 检验。
在治疗过程中，实验组的咬合平面倾斜度和上颌第二磨牙近中倾斜显著增加。此外，实验组的磨牙关系得到改善，覆盖减小。与对照组相比，Jones Jig 组的下颌切牙前倾更大，覆盖减小更多。鼻唇角变化无显著组间差异。
使用 Jones Jig 和 Distal Jet 治疗后再使用固定矫治器的治疗方案通过牙颌变化有效纠正 II 类错颌，而骨骼和软组织变化不明显。与未经治疗组相比，实验组的咬合平面呈顺时针旋转，上颌第二磨牙近中倾斜更大。
